public override Widget build(BuildContext context)
{
return(new DefaultTabController(
length: TabsDemoUtils._allPages.Count,
child: new Scaffold(
body: new NestedScrollView(
headerSliverBuilder: (BuildContext subContext, bool innerBoxIsScrolled) => {
return new List <Widget> {
new SliverOverlapAbsorber(
handle: NestedScrollView.sliverOverlapAbsorberHandleFor(subContext),
sliver: new SliverAppBar(
title: new Text("Tabs and scrolling"),
actions: new List <Widget> {
new MaterialDemoDocumentationButton(routeName)
},
pinned: true,
expandedHeight: 150.0f,
forceElevated: innerBoxIsScrolled,
bottom: new TabBar(
tabs: TabsDemoUtils._allPages.Keys.Select <_TabPage, Widget>(
(_TabPage page) => new Tab(text: page.label)
).ToList()
)
)
)
};
},
body: new TabBarView(
children: TabsDemoUtils._allPages.Keys.Select <_TabPage, Widget>((_TabPage page) => {
return new SafeArea(
top: false,
bottom: false,
child: new Builder(
builder: (BuildContext subContext) => {
return new CustomScrollView(
key: new PageStorageKey <_TabPage>(page),
slivers: new List <Widget> {
new SliverOverlapInjector(
handle: NestedScrollView.sliverOverlapAbsorberHandleFor(subContext)
),
new SliverPadding(
padding: EdgeInsets.symmetric(
vertical: 8.0f,
horizontal: 16.0f
),
sliver: new SliverFixedExtentList(
itemExtent: _CardDataItem.height,
del: new SliverChildBuilderDelegate(
(BuildContext subsubContext, int index) => {
_CardData data = TabsDemoUtils._allPages[page][index];
return new Padding(
padding: EdgeInsets.symmetric(
vertical: 8.0f
),
child: new _CardDataItem(
page: page,
data: data
)
);
},
childCount: TabsDemoUtils._allPages[page].Count
)
)
)
}
);
}
)
);
}).ToList()
)
)
)
));
}
public _CardDataItem(_TabPage page, _CardData data)
{
this.page = page;
this.data = data;
}